- An infrared view of (candidate accretion) disks around massive young stars
- Astronomical Society of the Pacific conference series
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Near-infrared surveys of high-mass star-forming regions start to shed light onto their stellar content. A particular class of objects found in these regions, the so-called massive Young Stellar Objects (YSOs) are surrounded by dense circumstellar material. Several near- and mid-infrared diagnostic tools are used to infer the physical characteristics and geometry of this circumstellar matter. Near-infrared hydrogen emission lines provide evidence for a disk-wind. The profiles of the first overtone of the CO band-heads, originating in the inner 10 AU from the central star, are well fitted assuming a Keplerian rotating disk. The mid-infrared spectral energy distribution requires the presence of a more extended envelope containing dust at a temperature of about 200 K. CRIRES observations of CO fundamental absorption lines confirm the presence of a cold envelope. We discuss the evolutionary status of these objects.
- Proceedings title: Massive Star Formation: Observations confront Theory: Proceedings of a conference held at the Heidelberg
Convention Center, Heidelberg, Germany, 10-14 September 2007
Publisher: Astronomical Society of the Pacific (ASP)
Place of publication: San Francisco, CA
Editors: H. Beuther, H. Linz, T. Henning
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